RE: Arrow wobble
Number your arrows one through ??? whatever you got shoot them all in no specific order. If you see one wobbling immediately go see which one it is. Mark it down on little pad. If the same ones wobble I would keep them as practice arrows or at least check to see if it spins true. Could be a bad or misaligned insert or a bad arrow. I have had them with weak or stiffer spines...especially cheaper carbons. Now switch the BH's off the identified problem shafts and put them on another arrow. See if it starts wobbling consistently now. If so it is a BH issue. They can be machined crooked or bent!
If there doesn't seem to be a certain shaft or two then its tim to look at your form or a mechanical issue with the bow. Most likely its form (Choking the Bow with your left hand).
Anyway, give this a try and let us know what you find.